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A composite material additive manufacturing method

A composite material and additive manufacturing technology, applied in the field of additive manufacturing, can solve the problems of poor surface quality, pores, cracks, etc. of parts, and achieve the effects of good surface quality, improved processing accuracy, and improved mechanical properties

Active Publication Date: 2019-12-03
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to propose a method for additive manufacturing of composite materials, which aims to solve the problems of poor surface quality, internal pores and cracks of parts manufactured by the prior art

Method used

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  • A composite material additive manufacturing method
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  • A composite material additive manufacturing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] see figure 2 , design the three-dimensional model of the part, slice and layer in the upward growth direction, set the thickness of each virtual layer to 0.8mm, and divide the part model into multiple virtual layers. And import the data of each virtual layer into the operating system of the processing equipment.

[0052] According to the shape of the first dummy layer, the composite material powder is laid. Among them, the composite material powder is a mixture of aluminum-copper alloy and carbon fiber at a weight ratio of 9:1, and both the aluminum-copper alloy and carbon fiber are crushed into a powder with a particle size of 50 μm.

[0053] After the first electron beam is used to heat the composite material powder up and down to a molten state, it is connected to a low-temperature nitrogen circulation device and cooled to form a first physical layer corresponding to the first virtual layer. Among them, the accelerating voltage of the first electron beam is set to...

Embodiment 2

[0057] see figure 2 , design the three-dimensional model of the part, slice and layer in the upward growth direction, set the thickness of each virtual layer to 0.6mm, and divide the part model into multiple virtual layers. And import the data of each virtual layer into the operating system of the processing equipment.

[0058] According to the shape of the first dummy layer, the composite material powder is laid. Among them, the metal material in the composite material powder is copper and gallium, the polymer material is carbon fiber, acrylonitrile-butadiene-styrene copolymer, the metal material and the polymer material are mixed at a weight ratio of 6:1, copper, gallium and Both carbon fiber and acrylonitrile-butadiene-styrene copolymer were pulverized into powders with a particle size of 60 μm.

[0059] After the first electron beam is used to heat the composite material powder up and down to a molten state, it is connected to a low-temperature nitrogen circulation devi...

Embodiment 3

[0063] see figure 2 , design the three-dimensional model of the part, slice and layer in the upward growth direction, set the thickness of each virtual layer to 0.8mm, and divide the part model into multiple virtual layers. And import the data of each virtual layer into the operating system of the processing equipment.

[0064] According to the shape of the first dummy layer, the composite material powder is laid. Among them, the composite material powder is made by mixing vanadium and polycarbonate at a weight ratio of 3:1, and both vanadium and polycarbonate are crushed into powders with a particle size of 70 μm.

[0065] After the first electron beam is used to heat the composite material powder up and down to a molten state, it is connected to a low-temperature nitrogen circulation device and cooled to form a first physical layer corresponding to the first virtual layer. Among them, the accelerating voltage of the first electron beam was set to 120kV; the scanning rate ...

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Abstract

The invention discloses a composite material additive manufacturing method. The composite material additive manufacturing method comprises the following steps: obtaining a three-dimensional model of apart to be machined, carrying out slicing and layering in the upward growth direction, and obtaining a plurality of virtual layers; laying composite material powder according to the shape of the first virtual layer; heating the composite material powder along the vertical direction by adopting a first electron beam and cooling to form a first solid layer; heating the upper surface of the first solid layer along the horizontal direction by adopting a second electron beam, paving composite material powder on the first solid layer according to the shape of the second virtual layer, and then heating and cooling by using the first electron beam; and repeating the previous steps until the part is formed. The first electron beam and the second electron beam are adopted to fully heat the interiorof the powder layer, and the upper surface of the solid layer is heated in the horizontal direction, so that the composite material powder and the solid layer are completely fused, and the manufactured part has few surface cracks and is excellent in quality.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a method for additive manufacturing of composite materials. Background technique [0002] The development of modern high technology is inseparable from composite materials, and composite materials play a very important role in the development of modern science and technology. The research depth and application breadth of composite materials and the speed and scale of production development have become one of the important symbols to measure the advanced level of a country's science and technology. The additive manufacturing technology based on composite materials is a hot spot in modern scientific research. [0003] Additive manufacturing technology is an advanced manufacturing technology that integrates computer science, optics, material science and other disciplines, and accumulates three-dimensional models of parts into parts with certain structures and functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B29C64/153B29C64/295B29C64/393B29C64/371B29C64/30B33Y10/00B33Y30/00B33Y40/00
CPCB29C64/153B29C64/295B29C64/393B29C64/371B29C64/30B33Y10/00B33Y30/00B33Y40/00B22F10/00B22F10/36B22F12/45B22F10/50B22F10/28Y02P10/25
Inventor 陈继兵张国靖杨军胜
Owner WUHAN POLYTECHNIC UNIVERSITY